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Papers by Author: Sylvie Foucaud

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Oxidation Resistance of Coated and Uncoated SiC-Based Refractories

Authors: Guillaume Di Vita, Olivier Preziosa, Sylvie Foucaud, Alexandre Maître, A. Denoirjean, C. Barthélémy

Abstract: The potentialities of ceramic coatings as a protective layer have been discussed by the comparison of the oxidation kinetics between coated and uncoated SiC-based materials. It was observed that a thermally sprayed coating of titanium dioxide (TiO2), in the same conditions of oxidation, decreases the kinetics constants and acts as a diffusion barrier. The evolution of the (micro-)structural features of oxidized materials were followed by XRD and SEM.

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Boron Nitride Nanoparticles: One-Step Synthesis from Single-Source Preceramic Precursors

Authors: Samuel Bernard, Vincent Salles, Sylvie Foucaud, Philippe Miele

Abstract: Boron nitride (B1.0N0.9) nanoparticles have been prepared by the spray-pyrolysis of borazine. Characterization of the B1.0N0.9 nanoparticles by SEM, and HRTEM demonstrated that samples form elementary blocks containing slightly agglomerated nanocrystalline particles with sizes ranging from 55 to 120 nm. Their thermal behavior has been investigated and thermogravimetric analyses of B1.0N0.9 nanoparticles showed that they are relatively stable in air atmospheres.